He must be using this device to use ryobi batteries as 120v power source.
https://www.homedepot.ca/product/ryo...ery/1001489458

I guess that's not a bad idea if you need your battery topped up without a power plug available.

I found these battery connectors, if you need to disconnect your battery it's very handy.


https://www.amazon.ca/dp/B096HD6P8F/...ing=UTF8&psc=1


X5chemist

How's your progress with the drain issue?